Research of a Novel Fluorescence Probe for Cu~(2+) and Its Applications in Environmental Analysis

摘要

In this paper, a novel fluorescence probe based on Rhodamine (RB), which can be used in the quick detection of Cu~(2+) in environment, was synthesized. It was found that the addition of Cu ions led to a significantly enhanced fluorescence, while other common metal ions such as Na~+, K~+, Mg~(2+), Ca~(2+), Mn~(2+), Co~(2+), Ni~(2+), Ag~+, Ba~(2+), Zn~(2+), Fe~(3+) and Fe~(2+) induced no or much smaller fluorescent spectral changes. The selective fluorescence enhancement of RN attributed to the spirolactam ring being opened upon the addition of Cu~(2+) To RN, and a highly delocalized conjugated structure of RN was formed.